Look for mold inside the coop, in corners particularly. What do you use for bedding?
Also look for mold inside feed sacks. If you see clumps in the feed, no matter what the size, it means that it was wet and then dried out. If that's the case return the feed where you bought it and get a refund or exchange it for another sack of feed.
Also look for mold inside feed sacks. If you see clumps in the feed, no matter what the size, it means that it was wet and then dried out. If that's the case return the feed where you bought it and get a refund or exchange it for another sack of feed.